From: Robert W. Schramm (schrammrus@hotmail.com)
Date: 07/17/02-02:50:59 PM Z
You might try Xtol. This contains milder developing agents that you would
probably not be sensitive to. Also Steve Anchell says HP4 and Xtol is the
best B&W combo available in terms of tonal range.
Bob Schramm
>From: Shannon Stoney <shannonstoney@earthlink.net>
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: alt-photo-process-l@sask.usask.ca
>Subject: Re: HP5+ and LONG development times
>Date: Wed, 17 Jul 2002 08:16:19 -0700
>
>Thanks for this info. I'm not quite ready to use pyro as I am very
>sensitive to photographic chemicals and I'm afraid it's too toxic for me.
>Maybe if I ever get a jobo processor and don't have to deal with splashing
>developer too much...I will look at Sandy's article though for future
>reference.
>
>Maybe I should switch back to Tri-X, my old favorite, although I would have
>to buy it in boxes of 50.
>
>--shannon
>
>
>
>----------
> >From: Clay Harmon <wcharmon@wt.net>
> >To: alt-photo-process-l@sask.usask.ca
> >Subject: Re: HP5+ and LONG development times
> >Date: Wed, Jul 17, 2002, 4:55 AM
> >
>
> > Shannon:
> >
> > Hp-5 is notorious for reaching so-called 'gamma infinity' quickly. That
>is
> > where at some point, additional development does not increase the
>contrast,
> > but only adds additional base+fog density (not desirable!) . You may
>need to
> > use a staining developer such as PMK, rollo pyro or Pyrocat-HD, which
>will
> > give a proportional (to silver density) UV blocking stain in the
>highlights
> > and behaves like additional density when printing UV sensitive
>processes.
> >
> > I use HP-5 with pyrocat-HD all the time in my big cameras and it works
>fine
> > with a density range of about 1.3-1.4. The stain actually makes the
> > effective density range more like 1.8-1.9. Pyrocat times for the density
> > range you're looking for would be about 11-13 minutes at 75 degrees.
>Check
> > out the Sandy King article at www.unblinkingeye.com for all the info. It
> > also is one of the cheapest developers around, and is pretty easy to
>mix.
> >
> > Staining developers are about the only way to go with HP-5 for alt-photo
> > density ranges, unless you only shoot really high contrast scenes. The
> > pinhole may be making your efforts a little harder also because of
>internal
> > flare.
> >
> > Clay
> >
> > on 7/17/02 12:48 AM, Shannon Stoney at shannonstoney@earthlink.net
>wrote:
> >
> >> I am shooting HP5+ in the 8x10 format in a pinhole camera for
>cyanotypes. I
> >> am having trouble getting the highlights dense enough. I am up to a 20
> >> minute development time now, and still the highlights only have a
>density of
> >> 1.71. I would like a density range of about 1.6, starting at 0.35,
>say, in
> >> the shadows. (I have to shoot it at like 3200 to get the shadows this
> >> thin!) Should I keep increasing the development times? Is it "bad" to
>go
> >> over 20 minutes? I process in straight D-76 in a homemade BTZS-style
>tube,
> >> at 68 degrees. I am thinking maybe I should make the temperature warmer
> >> rather than making the times longer. But, then what will I do if I
>ever
> >> have to increase the development time further for a low-constrast
>scene?
> >> (Excuse the cross posting if you read
> >> the pinhole and alt-process lists.)
> >>
> >> --shannon
> >>
> >
> >
> >
Check out my web page at:
also look at:
http://www.wlsc.wvnet.edu/www/pubrel/photo.html
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